Appasus Amyot & Serville, 1843: 430 (syn. Montandon, 1900a: 266, with Diplonychus; restored by J.T. Polhemus, 1995a: 649). Type species by monotypy: Appasus natator Amyot & Serville, 1843 (= Naucoris nepoides Fabricius, 1803).
Amyotella Spinola, 1850: 49 (syn. Spinola, 1850: 108). Type species by subsequent designation (Kirkaldy, 1906a: 152): Appasus natator Amyot & Serville, 1843 (= Naucoris nepoides Fabricius, 1803).
Muljaris Lee, 1991: 10 (syn. J.T. Polhemus, 1995a: 649). Type species by original designation: Appasus japonicus Vuillefroy, 1864.